I would run diskmgmt.msc to change the drive letter of the external to
something else, and start a backup to see if it sees it.
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"John O''Brien" <> wrote in message
news:CBBC4286-7414-4386-B36D-...
> I can no longer do a complete pc backup of my laptop to my external hard
> drive.
>
> Since my last successful backup I've formated my external hard drive and
> instaled broadband internet. Could either of these actions be causing the
> problem?
>
> I hope you can help.
>
> Thanks